Research of the scientific basis of leaf surface formation indicators in medium fiber cotton varieties

Abstract

The depth of seepage water in the Fergana region is also different, it is located at a depth of 1.0-3.0 meters, depending on the terrain, along the length of the large Fergana canal in the Kuvasoy and Margilan cones. The geographic areas of the region with irrigated agriculture are divided into three groups based on the amount of seepage water: 1,000 hectares are covered by seepage water up to one meter, 173,000 hectares are covered by seepage water between one and two meters, and 55,000 hectares are covered by seepage water between two and three meters. It was done with cotton types S-8290 & S-6775 according to grassy soil conditions. In this case, in the 1st term, in proportion to the cotton varieties, the leaf area during the heading period is 60.0 - 69.8 cm2, at flowering 1111.0-1258.0 cm2, at harvest 2999.3-3180.0 cm2 and at ripening 2900.6-13105. It was found to be equal to 0 cm2 and the number of leaves of S-8290 cotton variety is less than that of S-6775 variety, but due to the thinness of the leaf plate and the size of the leaf, it was shown that their leaf level is close to each other.